Rattle from engine when accelerating (sounds like keys)

[AustinL911]

On a more serious note, do the techs not have the ability to data log these things? I would think a quick look at what the knock sensors are doing should clear up any questions about whether its knocking or not. If the computer is pulling timing (which I imagine it would), then you've got a problem.

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[ShotCaller]

On a more serious note, do the techs not have the ability to data log these things? I would think a quick look at what the knock sensors are doing should clear up any questions about whether its knocking or not. If the computer is pulling timing (which I imagine it would), then you've got a problem.

"Its not throwing any codes...so its normal". Thats all they know ! They wont or cant even touch anything unless its throwing a code.

 

[ShadowsPapa]

I loved the older Jeep engines (others, too, for that matter) where you could tap the block with a hammer handle or the handle of a LARGE screwdriver and watch, with a timing light, as the timing changed, then went right back after you stopped hammering on the block. So simple to diagnose then.

 

[ShadowsPapa]

I just developed this at 1,400 miles today. Still no fix?

"still no fix" implies that it's the exact same cause of those symptoms for every JT when that's not likely to be the case.
Granted it could cover most, but it's always best to consult the dealer and get a case opened rather than assume the fix for Joe will also work for Sam.
At least one person found it was a shield, others may have detonation related to fuel issues, still others could be another issue.
Jeep has released more than one service bulletin related to PCM reprogramming - for more than one issue so perhaps you are covered under that but only your dealer can tell you for sure.

 

[bwm2020]

I just developed this at 1,400 miles today. Still no fix?

Agreed with what @ShadowsPapa said. they are all different for sure. I am still waiting for Chrysler field tech to come and check mine out. Who knows when they will send them out due to covid. I am still clicking along.

@bgc227, if something doesn't seem write, make sure you notice when and how the noise happens so you can let dealership know more specifically what to listen for. If not you will make wasted trips back and forth. Offer to ride with tech or vise versa. As long as you get it checked out.

 

[hjdca]

No matter what problem you have, it is important to log it with a dealer. Even if you know the dealer will just say it is normal. If something happens later, even, out of warranty --- ie. you modify your JT.... then, you have the issue logged to your VIN number, and you have a paper receipt, and it is much easier to argue that the issue was already there before the mods or before the warranty wore out.

 

[LoJac963]

I just developed this at 1,400 miles today. Still no fix?

Did you watch the video in the link to my thread I posted? Is it the same sound as mine and can be replicated at low RPMs. Mine is definitely not a rattling shield or other non-drivetrain related issues mentioned here. It is obviously something due to the lugging of the engine into such a low RPM.

 

[ShadowsPapa]

This post is NOT passing judgement on ANY person's JT "rattle". It's not claiming what it is or what it is not. It's not suggesting you should not take it to a dealer - YOU SHOULD and you should get on record what's going on, even more than once. This is only a "PLEASE TRIPLE CHECK AND NEVER ASSUME" post, based on personal experience, somewhat embarrassing, of course......
Some here know I have an 82 Eagle SX4. It came with a 258, the car had been abused, the 258 was loose, worn, high miles (I got it with 154,000 and drove it up to about 160,000 miles before oil pressure would not stay stable at lower RPMs so I had some fun and put a Jeep 4.0 in it)
The "engine" had a rattle when I lugged it. You know these AMC I6s run crazy great torque at low RPM, and having a T5 I was always pushing that thing hard up our hills, sometimes even starting out in 2nd just because I could. I looked and checked and could not find the "rattle" - sounded like it was pinging in a way.
I had converted the thing over to HEI because the original Motorcraft system had been hacked to pieces, wires cut and broken, the PO made a mess of things and I wanted to get it running, quickly and easily, so I bypassed all of the normal controls, including knock sensor, timing control and put in a basic HEI. I messed with timing, tried several different things. I already had the carb modified to run a bit more rich than the factory lean settings, it wasn't running hot.
I decided to go a different route and looked all over under the car for things that could possibly "rattle" even though I could prove nothing at that point.
I looked at the heavy hanger intended to hold the front of the CAT up and noticed the pins that went into the holes that were in the part of the hanger bolted to the chassis had some wear where there shouldn't normally be wear.
I replaced the pins that slid into a bracket with bolts and bolted that hanger solid.
A few weeks later I was looking through my binders and books of TSBs and D&R bulletins and ran across an interesting item related to - yeah, 1982 and other Eagle vehicles - front exhaust hanger rattles when engine under load at low RPM.
The torque "twisted" the rubber engine mounts enough that the pipe no longer hung normally with weight keeping it from rattling - now it was hitting the top of the hanger holes. Their solution in the TSB? Cut the pins, drill holes, bolt the bracket.......
The noise traveled along the pipe to the engine bay making it sound almost like engine noise.

Obviously a fair share of these JTs have engine-related issues - and enough people have had failures to prove Jeep has a bit of a problem here - but do leave no stone unturned.
And get it on record at the dealer.
I did that with a Cherokee I had in the 90s and glad I did as the warranty ran out but they still fixed the thing later when they finally after weeks of trying found the issue. But since I complained while in warranty, they had record of it, and had checked it over - after warranty expired they still fixed it.

 

[iGlad]

Took my truck in today for the first go at it. The service rep brought up fuel type and oil changes. We will see what they come back with after the tech looks it over.

 

[bwm2020]

So I finally recieved a call from @JeepCares and they said after reviewing all info and records that it is detemined that the spark knock/detonation is due to fuel type. So there is nothing else to do. Even though the noise is getting worse and last longer. I can get a second opinion but the process will start all over.
Seriously!! I call BS!!! So after a year and 20k+ miles of complaining about it and 10 or so times in the dealer for it, there is nothing to fix it. So I spent 50k+ for something that sounds like a car from the early 80’s cutting off and knocking. Needless to say I am not happy but love my Gladiator. So we will see down the road if I have engine issues!!! Good luck to others dealing with this.

 

[ShadowsPapa]

So I finally recieved a call from @JeepCares and they said after reviewing all info and records that it is detemined that the spark knock/detonation is due to fuel type. So there is nothing else to do. Even though the noise is getting worse and last longer. I can get a second opinion but the process will start all over.
Seriously!! I call BS!!! So after a year and 20k+ miles of complaining about it and 10 or so times in the dealer for it, there is nothing to fix it. So I spent 50k+ for something that sounds like a car from the early 80’s cutting off and knocking. Needless to say I am not happy but love my Gladiator. So we will see down the road if I have engine issues!!! Good luck to others dealing with this.

This is SOOO nuts because there are thousands of us out there running around with nothing more than 87 octane fuel. Some of us - like me - always run 10% because it's so darned much cheaper in Iowa, others here run pure gas - but still 87 octane.
So what exactly are they meaning or implying by "fuel type" - that covers a HUGE range of things!
Kerosene is a fuel, engines, tractors, and lamps have run on it for over a century.
Diesel is a fuel type........
Leaded gasoline is a fuel type, as is unleaded.
E85 is more a fuel blend, but you could call it a type.
Cox model airplane fuel is a fuel type.
Assuming they don't know the difference between fuel type and fuel QUALITY - then what exactly are they saying?
I'd force the issue on them - if it's FUEL TYPE - then tell them to SPECIFIC, tell you EXACTLY in great detail what TYPE of fuel you are to run.
No, I'm not joking. If it was me - and I hope it never is - but if it was, I'd say, ok, you are blaming this on fuel type.
Then you go fill it with the fuel YOU say it needs, I'll pay for it, you document that YOU put in the fuel "type" you said it must have - and we'll go from there. And next fill, I'll come back and pay you to fill it again........... and if it still pings, then you owe me.
I'd push it right back on them and not let them walk away saying "it's because of the fuel type".
That's pure bunk.
I'd also make sure I got a receipt for every time I put fuel in - where, what and time/date.
I'd go to a top tier gas, document it - and if it pings, toss it right back at them.
In Iowa, if you have been there at least 3 times for this same issue, you go for the lemon law.
And as long as you've started this process while it's under warranty - they must cover any future damage due to detonation if you follow exactly the "fuel type" they claim will fix it.

 

[bwm2020]

This is SOOO nuts because there are thousands of us out there running around with nothing more than 87 octane fuel. Some of us - like me - always run 10% because it's so darned much cheaper in Iowa, others here run pure gas - but still 87 octane.
So what exactly are they meaning or implying by "fuel type" - that covers a HUGE range of things!
Kerosene is a fuel, engines, tractors, and lamps have run on it for over a century.
Diesel is a fuel type........
Leaded gasoline is a fuel type, as is unleaded.
E85 is more a fuel blend, but you could call it a type.
Cox model airplane fuel is a fuel type.
Assuming they don't know the difference between fuel type and fuel QUALITY - then what exactly are they saying?
I'd force the issue on them - if it's FUEL TYPE - then tell them to SPECIFIC, tell you EXACTLY in great detail what TYPE of fuel you are to run.
No, I'm not joking. If it was me - and I hope it never is - but if it was, I'd say, ok, you are blaming this on fuel type.
Then you go fill it with the fuel YOU say it needs, I'll pay for it, you document that YOU put in the fuel "type" you said it must have - and we'll go from there. And next fill, I'll come back and pay you to fill it again........... and if it still pings, then you owe me.
I'd push it right back on them and not let them walk away saying "it's because of the fuel type".
That's pure bunk.
I'd also make sure I got a receipt for every time I put fuel in - where, what and time/date.
I'd go to a top tier gas, document it - and if it pings, toss it right back at them.
In Iowa, if you have been there at least 3 times for this same issue, you go for the lemon law.
And as long as you've started this process while it's under warranty - they must cover any future damage due to detonation if you follow exactly the "fuel type" they claim will fix it.

Even running the fuel suggested (Shell 93 can't think of the others, but Shell is the only one near me) the noise is still there. There is something internally wrong with these motors. Trust me, I will keep bugging them until a fix.

 

[ShadowsPapa]

Even running the fuel suggested (Shell 93 can't think of the others, but Shell is the only one near me) the noise is still there. There is something internally wrong with these motors. Trust me, I will keep bugging them until a fix.

I've put gas in mine from HyVee (an Iowa-based grocery chain), Casey's (Iowa based convenience store chain), Quick Trip (top tier station), Kum&Go, and whatever stations there were on the way from here to Fort Wayne and back, plus at least one fill on my trip to Omaha and back, all 87 octane 10% - never have heard so much as a ding or ping or rattle out of it, very smooth except I can tell when it changes modes from a cold start - there's a second or two of rough then it smooths out, and when the AC is on at idle, the silk has an occasional wrinkle in it - but to hear yours does this with Shell 93 octane - several points above recommended and a solid grade of gas - wow.

 

[LoJac963]

I've tried all different types and grades of fuel with no resolve. I guess a $60k truck will just sound like shit until Jeep decides to get their act together

 

[Deleted member 30519]

https://youtube.com/shorts/5g1xTFdpSMk

Mines been doing it since 3k miles. The dealer couldn't find the issue. The sound is getting really anoying.

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